Game Boy
Used by 5 peopleen.wikipedia.org ↗

“My main instrument is the original Nintendo Game Boy, model DMG-01.”
Paul Weinstein Interview, Chiptune artist · via Uses This 
“For ye olde chiptune music band I use a collection of repurposed old Nintendo Game Boys that have been customized for better sound quality and backlit for visibility on stage.”
James Primate Interview, Musician, game developer, artist (Rain World) · via Uses This